Latency Bounds of Packet-Based Fronthaul for Cloud-RAN with Functionality Split

TY - GEN

T1 - Latency Bounds of Packet-Based Fronthaul for Cloud-RAN with Functionality Split

AU - Mountaser, Ghizlane

AU - Mahlouji, Maliheh

AU - Mahmoodi, Toktam

PY - 2019

Y1 - 2019

N2 - The emerging Cloud-RAN architecture within the fifth generation (5G) of wireless networks plays a vital role in enabling higher flexibility and granularity. On the other hand, Cloud-RAN architecture introduces an additional link between the central, cloudified unit and the distributed radio unit, namely fronthaul (FH). Therefore, the foreseen reliability and latency for 5G services should also be provisioned over the FH link. In this paper, focusing on Ethernet as FH, we present a reliable packet based FH communication and demonstrate the upper and lower bounds of latency that can be offered. These bounds yield insights into the trade-off between reliability and latency, and enable the architecture design through choice of splitting point, focusing on high layer split between PDCP and RLC and low layer split between MAC and PHY, under different FH bandwidth and traffic properties. Presented model is then analyzed both numerically and through simulation, with two classes of 5G services that are ultra reliable low latency (URLL) and enhanced mobile broadband (eMBB).

AB - The emerging Cloud-RAN architecture within the fifth generation (5G) of wireless networks plays a vital role in enabling higher flexibility and granularity. On the other hand, Cloud-RAN architecture introduces an additional link between the central, cloudified unit and the distributed radio unit, namely fronthaul (FH). Therefore, the foreseen reliability and latency for 5G services should also be provisioned over the FH link. In this paper, focusing on Ethernet as FH, we present a reliable packet based FH communication and demonstrate the upper and lower bounds of latency that can be offered. These bounds yield insights into the trade-off between reliability and latency, and enable the architecture design through choice of splitting point, focusing on high layer split between PDCP and RLC and low layer split between MAC and PHY, under different FH bandwidth and traffic properties. Presented model is then analyzed both numerically and through simulation, with two classes of 5G services that are ultra reliable low latency (URLL) and enhanced mobile broadband (eMBB).

KW - Cloud-RAN

KW - Ethernet

KW - Fronthaul

KW - Latency

KW - Lower bound

KW - Reliability

KW - Upper bound

UR - http://www.scopus.com/inward/record.url?scp=85070188680&partnerID=8YFLogxK

U2 - 10.1109/ICC.2019.8761906

DO - 10.1109/ICC.2019.8761906

M3 - Conference contribution

VL - 2019-May

BT - 2019 IEEE International Conference on Communications, ICC 2019 - Proceedings

ER -